WO2023277424A1 - Axial line adjusting screw fastener - Google Patents

Axial line adjusting screw fastener Download PDF

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Publication number
WO2023277424A1
WO2023277424A1 PCT/KR2022/008732 KR2022008732W WO2023277424A1 WO 2023277424 A1 WO2023277424 A1 WO 2023277424A1 KR 2022008732 W KR2022008732 W KR 2022008732W WO 2023277424 A1 WO2023277424 A1 WO 2023277424A1
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WO
WIPO (PCT)
Prior art keywords
screw
lead screw
screw thread
tip
present
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PCT/KR2022/008732
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French (fr)
Korean (ko)
Inventor
이종윤
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주식회사 윤영테크
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Publication of WO2023277424A1 publication Critical patent/WO2023277424A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B33/00—Features common to bolt and nut
    • F16B33/02—Shape of thread; Special thread-forms
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
    • F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object

Definitions

  • the present invention relates to an axis-correction screw fastener that enables normal fastening while compensating for a misaligned axis even when the axis of a part to be fastened is slightly misaligned.
  • Screw fasteners such as bolts, screws, and nuts are essential fastening parts in assembly industries such as automobiles, electronics, and chemicals.
  • a female screw is formed on the frame
  • a fastening hole is formed on the part, and then a male thread fastener such as a bolt or screw is used to fasten.
  • US registered patent US5,836,731 employs a complex lead screw profile of a transitional curved profile in the shape of the lead screw thread, and thus has a problem in that it is difficult to design and process a rolling mold (die). In addition, there is also a problem that the function of axis line correction is not sufficiently exhibited when the pitch of the screw thread is reduced.
  • an object of the present invention is to provide an axis correction screw fitting that can be efficiently manufactured and that axis correction can be appropriately performed even in a screw having a narrow pitch.
  • an embodiment of the present invention is an axis correction screw fitting, comprising: a top screw portion having a plurality of top threads formed on a screw column having a front end and a rear end; and a lead screw portion formed between the front end of the screw column and the plurality of normal screw threads and having at least one lead screw thread, wherein the lead screw thread has a rear end slope having a predetermined angle, the rear end slope It is characterized in that it has a lead screw thread profile including a tip inclined surface having a smaller tip slope and a central curved portion composed of a gentle curved surface in contact with the rear end inclined surface and the tip inclined surface.
  • the central curved portion may be formed to have a single radius of curvature.
  • the center of the radius of curvature of the central curved portion may be offset toward the distal end from a point where an extension line of the rear end inclined surface and an extension line of the front end inclined surface meet each other.
  • a non-threaded cylindrical portion with no thread may be provided between at least one lead screw thread of the screw column and the front end portion.
  • the outer diameter of the non-threaded cylindrical portion may be smaller than the inner diameter of the screw thread of the counterpart female screw to be fastened.
  • the non-threaded cylindrical portion passes through the screw thread of the counterpart female screw without resistance during fastening.
  • a tip tapered portion may be formed between the non-threaded cylindrical portion and the tip portion.
  • a lead screw growth portion in which the outer diameter of the lead screw thread gradually completes growth within a 1/4 screw rotation angle from the non-screw cylindrical portion may be provided at the distal end of at least one of the lead screw threads.
  • the slope of the tip may be in the range of 40 degrees to 50 degrees. If the slope of the front end is 40 to 50 degrees smaller than the slope of the rear end, it is easy to go over the thread of the other female screw. Usually, the slope of the rear end is around 60 degrees.
  • the tip tapered portion may be formed in a round or straight shape.
  • the lead screw portion may have an outer diameter of the lead screw thread that is smaller than or equal to the pitch diameter of the normal screw thread.
  • the axis compensation screw fastener according to the present invention having the above structure has a simple shape of the lead screw thread, so it is easy to design and process the die, so that efficient manufacturing is possible. It provides an effect that axis line correction can be properly performed even in a narrow screw.
  • FIG. 1 is a side view of an axis correction screw fastener according to a first embodiment of the present invention.
  • Figure 2 is a front view of the axis correction screw fastener according to the first embodiment of the present invention as viewed from the front end side. (Front view according to View “A”)
  • FIG 3 is a side view of an axis correction screw fastener according to a second embodiment of the present invention.
  • FIG. 4 is a side view of an axis correction screw fitting according to a third embodiment of the present invention.
  • FIG. 5 is a side view of an axis correction screw fitting according to a fourth embodiment of the present invention.
  • the upper and lower parts mean that they are located above or below the object member, and do not necessarily mean that they are located above or below the gravitational direction.
  • FIG. 1 is a side view of an axis correction screw fitting according to a first embodiment of the present invention.
  • the screw is fastened with a strong coupling force by correcting the axis line between the parts and fastening them.
  • the axis-correction screw fitting 100 includes a screw column 60 and a screw head 50.
  • the axis correction screw fitting 100 includes a front end 1 and a rear end 2, and the front end 1 is inserted into the hole of the opposite female screw and fastened.
  • a screw head 50 is formed at the rear end 2, and receives rotational torque from the fastening tool through the screw head 50.
  • the screw head 50 of the axis correction screw fastener 100 of the present invention When the screw head 50 of the axis correction screw fastener 100 of the present invention is inserted into a fastening tool such as a hexagon wrench, screw driver, electric driver, air driver, etc., and the rotational torque of the tool is transmitted, the axis correction male screw of the present invention (100 ) is fastened to the opposite female thread.
  • a fastening tool such as a hexagon wrench, screw driver, electric driver, air driver, etc.
  • a plurality of normal screw threads 10, at least one lead screw thread 20, and a non-screw cylindrical portion 30 from the rear end side And a tip tapered portion 40 is formed.
  • the tip tapered portion 40 is adjacent to the tip portion 1, and the normal thread 10 at the rear end of the plurality of normal threads 10 is adjacent to the screw head portion 50.
  • the tip tapered portion 40 may have a round (R) or straight shape. In Example 1, a round is formed appropriately.
  • the screw shape of the normal normal screw thread 10 is manufactured in standard specifications.
  • the screw thread has a bone diameter and a bore diameter in a cylindrical screw body.
  • the screw thread has two sidewalls of about 60 degrees, and the top of the screw thread has a certain round (R), and similarly, the valley is rounded appropriately.
  • At least one lead screw thread 20 formed on the screw column portion 60 of the screw fastener 100 according to the first embodiment of the present invention is formed of three lead screw threads in the case of FIG. 1, and the present invention is not limited to the number of lead screw threads 20.
  • the plurality of lead screw threads 20 form a lead screw portion, and the plurality of normal threads 10 form a normal thread portion.
  • the plurality of lead screw threads 20 formed in the axis-correction screw fitting 100 according to the first embodiment of the present invention have a screw profile different from that of the normal screw thread 10.
  • the angle of the side wall at which the thread is formed is different.
  • the pitch corresponding to the distance between thread and thread is almost the same.
  • the outer diameter D2 of the lead screw thread 20 formed in the axis-correction screw fitting 100 according to the first embodiment of the present invention is smaller than the outer diameter D1 of the normal screw thread 10.
  • the outer diameter D2 of the lead screw thread 20 formed in the screw fitting 100 according to the first embodiment of the present invention is equal to or smaller than the pitch diameter Dp of the normal screw thread 10.
  • the outer diameter D2 of the lead screw thread 20 is the same as the pitch diameter Dp of the normal screw thread 10 as an example.
  • the lead screw thread 20 forcibly rides over the female screw thread forming the inner diameter of the opposite female screw to make fastening possible. It is done.
  • Fig. 1 enlarged view “a” The inclination of the rear end of the lead screw thread 20 of the screw fastener 100 capable of axis line correction according to the first embodiment of the present invention is the same as or similar to the normal screw thread 10 at 60 degrees. degree, and the slope of the front end (Fig. 1 enlarged view “b”) is made of 45 degrees, which is smaller than the slope of the rear end (60 degrees).
  • the screw thread profile 20p of the lead screw thread 20 of the screw fastener 100 capable of axis line correction according to the first embodiment of the present invention includes a rear inclined surface 20b having a rear end slope and a front end inclined surface 20a having a front end slope. ) and a central curved portion 20c having a gentle curved surface in contact with the rear and front inclined surfaces.
  • the central curved portion 20c is a curved portion forming the ridge of the lead screw thread 20, and includes an arc having a constant radius of curvature R, an ellipse, or a curved surface having a changing radius of curvature.
  • a certain amount of offset is formed between the point where the extension of the rear end straight portion 20a and the extension of the front end straight portion 20b meet and the center point of the central curved portion 20c by a certain radius of curvature R.
  • the central point of the central curved portion 20c is located toward the front end portion 1 by an offset amount from the point where the extension line of the rear straight portion 20a and the extension line of the front straight portion 20b meet.
  • the central curved portion 20c of the present invention is not a profile forming a conventional arbitrary transitional curve, but a profile formed by a straight line and an arc or a straight line and a tangent to a gently curved surface, so that the lead screw portion 20 is designed and Die processing is easy.
  • the axis correction is made. effect is further maximized.
  • the axis correction screw fitting 100 of the present invention is applied to the hole of the female screw while applying strong pressure using a fastening tool.
  • the lead screw thread 20 goes over the inner diameter of the screw thread of the counterpart female screw, and eventually the normal screw thread 10 is strongly fastened with the counterpart female screw.
  • the outer diameter D3 of the non-threaded cylindrical portion 30 is preferably smaller than the inner diameter (shaft diameter) of the counterpart female thread. Therefore, the non-threaded cylindrical portion 30 is inserted into the opposite female screw without resistance and leads to fastening.
  • the lead screw 20 formed at the most distal end of the lead screw thread 20 starts from the non-screw cylindrical portion 30 where no screw is formed and gradually progresses in an area of about 90 degrees or less (the 1/4 screw rotation area). As the outer diameter increases, the lead screw thread 20 completely grows. A lead screw growth start portion 21, a lead screw growth transition portion 22, and a lead screw growth completion portion 23 are sequentially provided at the distal end of the lead screw thread 20. From the beginning of the lead screw thread 20, growth of the lead screw thread is completed within about 90 degrees (1/4 turn).
  • the lead screw growth start portion 21, the lead screw growth transition portion 22, and the lead screw growth completion portion 23 at the tip side of the lead screw head 20 are collectively referred to as the lead screw growth portion 24.
  • Figure 2 is a front view of the axis correction screw fastener 100 according to the first embodiment of the present invention viewed from the front end side. (Front view according to View “A”)
  • the inside of the first concentric circle of the axis-correction screw fitting 100 of the present invention corresponds to the front end portion 1 of the screw.
  • the second concentric circle corresponds to the non-threaded cylindrical portion 30, and the area between the first concentric circle and the second concentric circle corresponds to the tip tapered portion 40.
  • the third concentric circle corresponds to the lead thread 20 and the fourth concentric circle corresponds to the normal thread 10.
  • the non-circular curved surface between the second concentric circle and the third concentric circle in the fourth quadrant of the concentric circle is composed of a lead screw growth start portion 21, a lead screw growth transition portion 22, and a lead screw growth completion portion 23. It expresses the lead screw growth part 24.
  • connection portion of the third concentric circle and the fourth concentric circle marked in the fourth quadrant of the concentric circle shows the connection portion 26 where the lead screw 20 grows into the normal screw 10.
  • the lead screw 20 is completed growing into a normal screw 10.
  • the present invention is not limited to the rotation angle of the screw when growing from the lead screw part 20 to the normal screw part 10. It can grow into a normal screw within 90 degrees or around 60 degrees.
  • each screw in the 4 quadrants of concentric circles is just one example. Growth can be completed within any rotation angle in any quadrant or location.
  • FIG 3 is a side view of an axis correction screw fitting 100 according to a second embodiment of the present invention.
  • the second embodiment of the present invention is different from the first embodiment in that the slope (b) of the tip of the lead screw portion 20 is 40 degrees, which is slightly smaller than the 45 degrees of the tip of the first embodiment.
  • the outer diameter of the lead screw part 20 is slightly smaller than the outer diameter of the lead screw part 20 of the first embodiment, which is more easily inserted into the other female screw part and goes over the inner diameter of the other female screw part. it is easy
  • FIG. 4 is a side view of an axis correction screw fitting 100 according to a third embodiment of the present invention.
  • the third embodiment of the present invention compares the first embodiment (45 degrees) and the second embodiment (40 degrees) in that the tilt (b) of the tip of the lead screw portion 20 is 50 degrees compared to the first and second embodiments. Fig.) is different from
  • the outer diameter of the lead screw portion 20 is larger than that of the first or second embodiments.
  • FIG 5 is a side view of an axis correction screw fitting 100 according to a fourth embodiment of the present invention.
  • the shape of the tip tapered portion 40 is different from the first to third embodiments.
  • the tip tapered portion 40 of the first to third embodiments is a tapered portion with appropriate rounding, and the fifth embodiment corresponds to a straight tapered portion.
  • the first to third embodiments of the present invention were applied to commonly used fastening bolts having a pitch of 4 to 15 mm, and good results were obtained when the tip inclination of the lead screw thread was 40 to 50 degrees. However, in most fastening bolts, negative results were obtained in the axis correction function and the outer diameter management of the lead screw when the tip angle was 55 degrees or more or the tip angle was 35 degrees or less.

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Abstract

The present invention relates to a screw fastener capable of adjusting an axial line. The axial line adjusting screw fastener of the present invention comprises: a normal screw portion having a plurality of normal screw threads formed on a screw post having a front end portion and a rear end portion; and a lead screw portion having at least one lead screw thread which is formed between the front end portion of the screw post and the plurality of normal screw threads and has a lead screw thread outer diameter that is equal to or less than a pitch diameter of the normal screw thread, wherein the at least one lead screw thread includes a lead screw thread profile having a rear end straight portion having a rear end gradient of a certain angle, a front end straight portion having a front end gradient that is less than the rear end gradient, and a central curved portion formed in a slow curve coming into contact with the front end straight portion and the rear end straight portion. The axial line adjusting screw fastener of the present invention adjusts an axial line through a fastening process, even if axial lines do not accurately match when fastening with a counterpart female screw.

Description

축선보정 나사체결구Axis correction screw fitting
본 발명은 체결되는 부품의 축선이 약간 어긋난 경우에도 어긋난 축선을 보정하면서 정상적으로 체결하는 것을 가능하게 하는 축선보정 나사체결구에 관한 발명이다.The present invention relates to an axis-correction screw fastener that enables normal fastening while compensating for a misaligned axis even when the axis of a part to be fastened is slightly misaligned.
자동차, 전자, 화학 등의 조립산업에 있어서 볼트, 스크류 및 너트 등과 같은 나사 체결구는 필수적인 체결 부품이다. 일반적으로 부품을 프레임에 체결하기 위해서는 프레임에 암나사를 형성하고, 부품에는 체결구멍을 형성한 후 볼트 혹은 스크류와 같은 숫나사 체결구를 이용하여 체결한다.Screw fasteners such as bolts, screws, and nuts are essential fastening parts in assembly industries such as automobiles, electronics, and chemicals. In general, in order to fasten a part to a frame, a female screw is formed on the frame, a fastening hole is formed on the part, and then a male thread fastener such as a bolt or screw is used to fasten.
이때, 프레임의 암나사에 숫나사가 일직선상으로 얼라인되지 않고 약간 어긋난 경우에는 숫나사가 암나사에 체결이 정확하게 되지 않은 문제가 있다. 이와 같은 문제를 해결하기 위하여 암나사와 부품의 구멍이 정확히 얼라인되지 않은 경우에도 자동으로 축선을 보정하며 체결하는 나사체결구에 관한 발명으로 미국 MAThread, Inc 사의 미국 등록특허 US5,836,731 “Anti-cross Threading Fastener" 특허가 제시 되었다. At this time, when the male screw is not aligned in a straight line with the female screw of the frame but slightly shifted, there is a problem in that the male screw is not accurately fastened to the female screw. In order to solve such a problem, even if the female screw and the hole of the part are not precisely aligned, an invention related to a screw fastener that automatically corrects and fastens the axis line, US MAThread, Inc.'s US registered patent US5,836,731 “Anti-cross Threading Fastener" patent was presented.
미국 등록특허 US5,836,731 는 리드나사산의 형태에 있어서 트랜지셔널 곡면 프로파일(transitional curved profile)의 복잡한 리드나사 프로파일을 채용하고 있어, 설계 및 전조 금형(다이)의 가공이 곤란하다는 문제가 있다. 그리고 나사산의 피치가 작아질 때 축선보정의 기능이 충분히 발휘되지 못하다는 문제도 존재하고 있다.US registered patent US5,836,731 employs a complex lead screw profile of a transitional curved profile in the shape of the lead screw thread, and thus has a problem in that it is difficult to design and process a rolling mold (die). In addition, there is also a problem that the function of axis line correction is not sufficiently exhibited when the pitch of the screw thread is reduced.
따라서 본 발명의 목적은 효율적인 제조가 가능하고 피치가 좁은 나사에서도 축선보정이 적적히 이루어질 수 있는 축선보정 나사체결구를 제공하는 것이다. Accordingly, an object of the present invention is to provide an axis correction screw fitting that can be efficiently manufactured and that axis correction can be appropriately performed even in a screw having a narrow pitch.
상기 기술적 과제를 달성하기 위하여, 본 발명의 일실시예는 축선보정 나사체결구에 있어서, 선단부와 후단부를 가지는 나사기둥에 형성된 복수개의 정상나사산을 갖는 정상나사부; 및 상기 나사기둥의 상기 선단부와 복수개의 상기 정상나사산 사이에 형성되며, 적어도 하나의 리드나사산을 갖는 리드나사부를 포함하고, 상기 리드나사산은 일정각도의 후단부기울기를 가지는 후단경사면, 상기 후단부기울기보다 작은 선단부기울기를 가지는 선단경사면 및 상기 후단경사면 및 상기 선단경사면과 서로 접하는 완만한 곡면으로 이루어지는 중앙만곡부를 포함하는 리드나사산 프로파일을 가지는 것을 특징으로 하는 축선보정 나사체결구를 제공한다.In order to achieve the above technical problem, an embodiment of the present invention is an axis correction screw fitting, comprising: a top screw portion having a plurality of top threads formed on a screw column having a front end and a rear end; and a lead screw portion formed between the front end of the screw column and the plurality of normal screw threads and having at least one lead screw thread, wherein the lead screw thread has a rear end slope having a predetermined angle, the rear end slope It is characterized in that it has a lead screw thread profile including a tip inclined surface having a smaller tip slope and a central curved portion composed of a gentle curved surface in contact with the rear end inclined surface and the tip inclined surface. Provided.
본 발명의 일실시예에 있어서, 상기 중앙만곡부는 단일 곡률반경을 가지도록 이루어질 수 있다.In one embodiment of the present invention, the central curved portion may be formed to have a single radius of curvature.
본 발명의 일실시예에 있어서, 상기 중앙만곡부의 곡률반경의 중심은 상기 후단경사면의 연장선과 상기 선단경사면의 연장선이 서로 만나는 지점보다 상기 선단부 쪽으로 옵셋될 수 있다.In one embodiment of the present invention, the center of the radius of curvature of the central curved portion may be offset toward the distal end from a point where an extension line of the rear end inclined surface and an extension line of the front end inclined surface meet each other.
본 발명의 일실시예에 있어서, 상기 나사기둥의 적어도 하나의 리드나사산과 상기 선단부 사이에는 나사가 형성되지 않은 비나사원통부가 구비될 수 있다.In one embodiment of the present invention, a non-threaded cylindrical portion with no thread may be provided between at least one lead screw thread of the screw column and the front end portion.
본 발명의 일실시예에 있어서, 상기 비나사원통부의 외경은 체결되는 상대방 암나사의 나사산 내경보다 작은 것일 수 있다. 이러한 비나사원통부는 체결시 상대방 암나사의 나사산을 저항없이 통과한다. In one embodiment of the present invention, the outer diameter of the non-threaded cylindrical portion may be smaller than the inner diameter of the screw thread of the counterpart female screw to be fastened. The non-threaded cylindrical portion passes through the screw thread of the counterpart female screw without resistance during fastening.
본 발명의 일실시예에 있어서, 상기 비나사원통부와 상기 선단부 사이에는 선단테이퍼부가 형성될 수 있다.In one embodiment of the present invention, a tip tapered portion may be formed between the non-threaded cylindrical portion and the tip portion.
본 발명의 일실시예에 있어서, 적어도 하나의 상기 리드나사산의 선단측에는, 상기 비나사원통부로부터 1/4 나사 회전 각도 이내에서 상기 리드나사산의 외경이 점진적으로 성장을 완료하는 리드나사성장부를 가질 수 있다.In one embodiment of the present invention, a lead screw growth portion in which the outer diameter of the lead screw thread gradually completes growth within a 1/4 screw rotation angle from the non-screw cylindrical portion may be provided at the distal end of at least one of the lead screw threads. there is.
본 발명의 일실시예에 있어서, 상기 선단부기울기는 40도 내지 50도 영역일 수 있다. 이러한 선단부기울기는 후단부기울기보다 작은 40도 내지 50도를 사용하면 상대방 암나사의 나사산을 타고 넘어가기가 용이하다. 통상 후단부기울기는 60도 내외이다.In one embodiment of the present invention, the slope of the tip may be in the range of 40 degrees to 50 degrees. If the slope of the front end is 40 to 50 degrees smaller than the slope of the rear end, it is easy to go over the thread of the other female screw. Usually, the slope of the rear end is around 60 degrees.
본 발명의 일실시예에 있어서, 상기 선단테이퍼부는 라운드 또는 직선형태로 이루어질 수 있다.In one embodiment of the present invention, the tip tapered portion may be formed in a round or straight shape.
본 발명의 일실시예에 있어서, 상기 리드나사부는 상기 정상나사산의 피치경보다 작거나 같은 상기 리드나사산 외경을 갖도록 이루어질 수 있다.In one embodiment of the present invention, the lead screw portion may have an outer diameter of the lead screw thread that is smaller than or equal to the pitch diameter of the normal screw thread.
이상과 같은 구성을 가지는 본 발명에 따른 축선보정 나사체결구는, 리드나사산의 형상이 단순하여 설계 및 다이의 가공이 용이하므로 효율적인 제조가 가능하며, 선단측 경사면의 기울기가 후단측에 비해 작기 때문에 피치가 좁은 나사에서도 축선보정이 적절히 이루어질 수 있다는 효과를 제공한다.The axis compensation screw fastener according to the present invention having the above structure has a simple shape of the lead screw thread, so it is easy to design and process the die, so that efficient manufacturing is possible. It provides an effect that axis line correction can be properly performed even in a narrow screw.
본 발명의 효과는 상기한 효과로 한정되는 것은 아니며, 본 발명의 상세한 설명 또는 특허청구범위에 기재된 발명의 구성으로부터 추론 가능한 모든 효과를 포함하는 것으로 이해되어야 한다.The effects of the present invention are not limited to the above effects, and should be understood to include all effects that can be inferred from the detailed description of the present invention or the configuration of the invention described in the claims.
도 1은 본 발명의 제1실시예에 의한 축선보정 나사체결구의 측면도이다. 1 is a side view of an axis correction screw fastener according to a first embodiment of the present invention.
도 2는 본 발명의 제1실시예에 따른 축선보정 나사체결구를 선단측에서 바라본 정면도이다. (View “A" 에 따른 정면도) Figure 2 is a front view of the axis correction screw fastener according to the first embodiment of the present invention as viewed from the front end side. (Front view according to View “A”)
도 3은 본 발명의 제2실시예에 의한 축선보정 나사체결구의 측면도이다. 3 is a side view of an axis correction screw fastener according to a second embodiment of the present invention.
도 4는 본 발명의 제3실시예에 의한 축선보정 나사체결구의 측면도이다. 4 is a side view of an axis correction screw fitting according to a third embodiment of the present invention.
도 5는 본 발명의 제4실시예에 의한 축선보정 나사체결구의 측면도이다. 5 is a side view of an axis correction screw fitting according to a fourth embodiment of the present invention.
이하에서는 첨부한 도면을 참조하여 본 발명을 설명하기로 한다. 그러나 본 발명은 여러 가지 상이한 형태로 구현될 수 있으며, 따라서 여기에서 설명하는 실시예로 한정되는 것은 아니다. 그리고 도면에서 본 발명을 명확하게 설명하기 위해서 설명과 관계없는 부분은 생략하였으며, 명세서 전체를 통하여 유사한 부분에 대해서는 유사한 도면 부호를 붙였다.Hereinafter, the present invention will be described with reference to the accompanying drawings. However, the present invention may be embodied in many different forms and, therefore, is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.
명세서 전체에서, 어떤 부분이 다른 부분과 "연결"되어 있다고 할 때, 이는 "직접적으로 연결"되어 있는 경우뿐 아니라, 그 중간에 다른 부재를 사이에 두고 "간접적으로 연결"되어 있는 경우도 포함한다. 또한 어떤 부분이 어떤 구성요소를 "포함"한다고 할 때, 이는 특별히 반대되는 기재가 없는 한 다른 구성요소를 제외하는 것이 아니라 다른 구성요소를 더 구비할 수 있다는 것을 의미한다.Throughout the specification, when a part is said to be "connected" to another part, this includes not only the case where it is "directly connected" but also the case where it is "indirectly connected" with another member interposed therebetween. . In addition, when a part "includes" a certain component, it means that it may further include other components without excluding other components unless otherwise stated.
본 발명에서 상부와 하부는 대상부재의 위 또는 아래에 위치함을 의미하는 것으로, 반드시 중력방향을 기준으로 상부 또는 하부에 위치하는 것을 의미하는 것은 아니다.In the present invention, the upper and lower parts mean that they are located above or below the object member, and do not necessarily mean that they are located above or below the gravitational direction.
이하, 첨부된 도면을 참조하여 본 발명의 실시예에 대하여 상세히 설명한다. 본 발명의 특징 및 이점들은 첨부된 도면에 의거한 바람직한 실시예에 의한 설명으로 더욱 명백해진다. Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The features and advantages of the present invention will become more apparent from the description of preferred embodiments based on the accompanying drawings.
도 1은 본 발명 제1실시예에 의한 축선보정 나사체결구의 측면도이다. 1 is a side view of an axis correction screw fitting according to a first embodiment of the present invention.
자동차, 전자, 화학, 철강, 장치 등의 조립산업에 있어서 체결되는 부품간의 모든 구멍이 항상 얼라인 되는 것은 아니다. 통상 조립되는 부품의 구멍 간에는 조립 공차에 의하여 축선이 얼라인 되지 않는 경우도 발생할 수 있다. In the assembly industry of automobiles, electronics, chemicals, steel, equipment, etc., not all holes between fastened parts are always aligned. There may also be cases in which axes are not aligned between holes of normally assembled parts due to assembly tolerances.
이런 경우에 본 발명의 축선보정 나사체결구(100)를 사용하면 부품간의 축선을 보정하면서 체결되도록 하여 강한 결합력으로 나사의 체결이 이루어진다.In this case, when the axis line correction screw fitting 100 of the present invention is used, the screw is fastened with a strong coupling force by correcting the axis line between the parts and fastening them.
본 발명 제1실시예에 의한 축선보정 나사체결구(100)는 나사기둥(60) 및 나사머리부(50)를 포함한다.The axis-correction screw fitting 100 according to the first embodiment of the present invention includes a screw column 60 and a screw head 50.
축선보정 나사체결구(100)는 선단부(1) 및 후단부(2)를 포함하며, 선단부(1)는 상대방 암나사의 구멍에 끼워져 체결이 시작되는 부분이다. 후단부(2)에는 나사머리부(50)가 형성되고, 나사머리부(50)를 통하여 체결공구로부터 회전 토르크를 받는다.The axis correction screw fitting 100 includes a front end 1 and a rear end 2, and the front end 1 is inserted into the hole of the opposite female screw and fastened. A screw head 50 is formed at the rear end 2, and receives rotational torque from the fastening tool through the screw head 50.
육각렌치, 스크류 드라이버, 전동드라이버, 에어드라이버 등의 체결공구에 본 발명 축선 보정 나사체결구(100)의 나사머리부(50)를 끼우고 공구의 회전 토르크를 전달하면 본 발명 축선 보정 숫나사(100)는 상대방 암나사에 체결된다.When the screw head 50 of the axis correction screw fastener 100 of the present invention is inserted into a fastening tool such as a hexagon wrench, screw driver, electric driver, air driver, etc., and the rotational torque of the tool is transmitted, the axis correction male screw of the present invention (100 ) is fastened to the opposite female thread.
본 발명의 제1실시예에 따른 축선보정 나사체결구(100)의 나사기둥(60)에는 후단측으로부터 복수개의 정상나사산(10), 적어도 하나의 리드나사산(20), 비나사원통부(30) 및 선단테이퍼부(40)가 형성된다.In the screw column 60 of the axis correction screw fitting 100 according to the first embodiment of the present invention, a plurality of normal screw threads 10, at least one lead screw thread 20, and a non-screw cylindrical portion 30 from the rear end side And a tip tapered portion 40 is formed.
선단테이퍼부(40)는 선단부(1)와 인접하고 복수개의 정상나사산(10)의 가장 후단측의 정상나사산(10)은 나사머리부(50)와 인접한다. 선단테이퍼부(40)는 라운드(R) 혹은 직선 형태가 가능하다. 실시예1에서는 적절하게 라운드를 형성한다.The tip tapered portion 40 is adjacent to the tip portion 1, and the normal thread 10 at the rear end of the plurality of normal threads 10 is adjacent to the screw head portion 50. The tip tapered portion 40 may have a round (R) or straight shape. In Example 1, a round is formed appropriately.
통상의 정상나사산(10)의 나사 형태는 표준규격으로 제작된다. 나사산은 원통형의 나사몸체에서 골경과 산경을 가진다. 또한, 나사산은 약 60도 정도의 두 개의 측벽을 가지며 나사산의 정상부위는 일정한 라운드(R)를 가지고 마찬가지로 골짜기에도 적절한 라운드를 형성한다.The screw shape of the normal normal screw thread 10 is manufactured in standard specifications. The screw thread has a bone diameter and a bore diameter in a cylindrical screw body. In addition, the screw thread has two sidewalls of about 60 degrees, and the top of the screw thread has a certain round (R), and similarly, the valley is rounded appropriately.
한편, 본 발명 제1실시예에 따른 나사체결구(100)의 나사기둥부(60)에 형성된 적어도 하나의 리드나사산(20)은 도 1의 경우에는 3개의 리드나사산을 형성한 것이고, 본 발명은 리드나사산(20)의 개수에 한정되지 않는다. 복수의 리드나사산(20)은 리드나사부를 형성하고, 복수의 정상나사산(10)은 정상나사부를 형성한다.On the other hand, at least one lead screw thread 20 formed on the screw column portion 60 of the screw fastener 100 according to the first embodiment of the present invention is formed of three lead screw threads in the case of FIG. 1, and the present invention is not limited to the number of lead screw threads 20. The plurality of lead screw threads 20 form a lead screw portion, and the plurality of normal threads 10 form a normal thread portion.
정상나사산(10)과 리드나사산(20)의 피치는 거의 동일하므로, 나사의 1회전에 의하여 선단방향으로 진입하는 거리는 정상나사산(10) 및 리드나사산(20)이 거의 동일하다.Since the pitches of the normal screw thread 10 and the lead screw thread 20 are almost the same, the normal screw thread 10 and the lead screw thread 20 have almost the same distance to enter the tip direction by one rotation of the screw.
본 발명 제1실시예에 따른 축선보정 나사체결구(100)에 형성된 복수의 리드나사산(20)은 정상나사산(10)과는 상이한 나사 프로파일을 가진다. 특히, 나사산이 형성되는 측벽의 각도가 상이하다. 나사산과 나사산의 거리에 해당하는 피치는 거의 동일하다. The plurality of lead screw threads 20 formed in the axis-correction screw fitting 100 according to the first embodiment of the present invention have a screw profile different from that of the normal screw thread 10. In particular, the angle of the side wall at which the thread is formed is different. The pitch corresponding to the distance between thread and thread is almost the same.
본 발명 제1실시예에 따른 축선보정 나사체결구(100)에 형성된 리드나사산(20)의 외경(D2)은 정상나사산(10)의 외경(D1)보다 작다. 본 발명 제1실시예에 따른 나사체결구(100)에 형성된 리드나사산(20)의 외경(D2)은 정상나사산(10)의 피치경(Dp)보다 같거나 작다. 도 1의 확대도에서는 리드나사산(20)의 외경(D2)이 정상나사산(10)의 피치경(Dp)과 동일한 것을 예로 들었다.The outer diameter D2 of the lead screw thread 20 formed in the axis-correction screw fitting 100 according to the first embodiment of the present invention is smaller than the outer diameter D1 of the normal screw thread 10. The outer diameter D2 of the lead screw thread 20 formed in the screw fitting 100 according to the first embodiment of the present invention is equal to or smaller than the pitch diameter Dp of the normal screw thread 10. In the enlarged view of FIG. 1 , the outer diameter D2 of the lead screw thread 20 is the same as the pitch diameter Dp of the normal screw thread 10 as an example.
따라서, 본 발명 축선보정 나사체결구(100)와 체결되는 상대방 암나사의 구멍이 완전히 얼라인되지 않은 경우에도 리드나사산(20)은 상대방 암나사의 내경을 형성하는 암나사 산경을 강제로 타고 넘어가서 체결이 이루어진다. Therefore, even when the hole of the opposite female screw fastened with the axis correction screw fastener 100 of the present invention is not completely aligned, the lead screw thread 20 forcibly rides over the female screw thread forming the inner diameter of the opposite female screw to make fastening possible. It is done.
본 발명 제1실시예에 따른 축선보정이 가능한 나사체결구(100)의 리드나사산(20)의 후단부기울기(도 1 확대도 “a”)는 정상나사산(10)과 동일하거나 유사한 통상의 60도 내외이고, 선단부기울기 (도 1 확대도 “b")는 후단부기울기(60도)보다 작은 45도로 이루어진다.The inclination of the rear end of the lead screw thread 20 of the screw fastener 100 capable of axis line correction according to the first embodiment of the present invention (Fig. 1 enlarged view “a”) is the same as or similar to the normal screw thread 10 at 60 degrees. degree, and the slope of the front end (Fig. 1 enlarged view “b”) is made of 45 degrees, which is smaller than the slope of the rear end (60 degrees).
본 발명 제1실시예에 따른 축선보정이 가능한 나사체결구(100)의 리드나사산(20)의 나사산 프로파일(20p)은 후단부기울기를 가지는 후단경사면(20b), 선단부기울기를 가지는 선단경사면(20a) 및 후단경사면 및 선단경사면과 접하는 완만한 곡면을 가지는 중앙만곡부(20c)를 포함하여 이루어진다.The screw thread profile 20p of the lead screw thread 20 of the screw fastener 100 capable of axis line correction according to the first embodiment of the present invention includes a rear inclined surface 20b having a rear end slope and a front end inclined surface 20a having a front end slope. ) and a central curved portion 20c having a gentle curved surface in contact with the rear and front inclined surfaces.
본 발명의 바람직한 실시예로서 중앙만곡부(20c)는 리드나사산(20)의 산경을 형성하는 곡면부로서 일정한 곡률반경(R)을 가지는 원호, 타원 혹은 변화하는 곡률반경을 가지는 곡면 등을 포함한다.As a preferred embodiment of the present invention, the central curved portion 20c is a curved portion forming the ridge of the lead screw thread 20, and includes an arc having a constant radius of curvature R, an ellipse, or a curved surface having a changing radius of curvature.
또한, 후단직선부(20a)의 연장선과 선단직선부(20b)의 연장선이 만나는 지점과 일정한 곡률반경(R)에 의한 중앙만곡부(20c)의 중심점 사이에는 일정량의 옵셋(Offset)이 형성된다. In addition, a certain amount of offset is formed between the point where the extension of the rear end straight portion 20a and the extension of the front end straight portion 20b meet and the center point of the central curved portion 20c by a certain radius of curvature R.
즉, 중앙만곡부(20c)의 중심점은 후단직선부(20a)의 연장선과 선단직선부(20b)의 연장선이 만나는 지점보다 옵셋(Offset)량 만큼 선단부(1) 쪽에 위치한다. That is, the central point of the central curved portion 20c is located toward the front end portion 1 by an offset amount from the point where the extension line of the rear straight portion 20a and the extension line of the front straight portion 20b meet.
본 발명의 중앙만곡부(20c)는 종래의 임의의 트랜지셔널한 커브를 형성하는 프로파일이 아니라 직선과 원호 혹은 직선과 완만한 곡면부의 접선에 의하여 형성되는 프로파일을 가지므로 리드나사부(20) 설계 및 다이 가공이 용이하다. The central curved portion 20c of the present invention is not a profile forming a conventional arbitrary transitional curve, but a profile formed by a straight line and an arc or a straight line and a tangent to a gently curved surface, so that the lead screw portion 20 is designed and Die processing is easy.
또한, 선단부기울기(b)가 후단부기울기(a)보다 작으므로 리드나사산(20)이 상대방 암나사에 끼워질 때 상대방 암나사의 나사산을 타고 넘어 가기가 용이하다.In addition, since the inclination of the front end (b) is smaller than the inclination of the rear end (a), when the lead screw thread 20 is inserted into the counterpart female screw, it is easy to go over the thread of the counterpart female screw.
또한, 리드나사산 프로파일 설계 시 리드나사산(20)의 외경(D2)를 정상나사산(10)의 외경(D1)보다 작을 뿐만 아니라, 정상나사산(10)의 피치경(Dp)보다 작게 형성하면 축선보정의 효과가 더욱 극대화된다. In addition, when designing the lead screw thread profile, if the outer diameter (D2) of the lead screw thread (20) is smaller than the outer diameter (D1) of the normal thread (10) and smaller than the pitch diameter (Dp) of the normal thread (10), the axis correction is made. effect is further maximized.
이와 같이 리드나사산(20)의 선단부기울기(b)를 후단부기울기(a)보다 작게 설정함으로써 본 발명의 축선보정 나사체결구(100)를 체결공구를 이용하여 강하게 압력을 가하면서 암나사의 구멍에 대하여 체결이 이루어지면 리드나사산(20)은 상대방 암나사의 나사산 내경을 타고 넘어가서 결국에는 정상나사산(10)들이 상대방 암나사와 강한 체결이 이루어진다.In this way, by setting the inclination (b) of the front end of the lead screw thread 20 smaller than the inclination (a) of the rear end, the axis correction screw fitting 100 of the present invention is applied to the hole of the female screw while applying strong pressure using a fastening tool. When the fastening is performed, the lead screw thread 20 goes over the inner diameter of the screw thread of the counterpart female screw, and eventually the normal screw thread 10 is strongly fastened with the counterpart female screw.
정상나사산(10)의 외경(D1), 리드나사산(20)의 외경(D2) 및 비나사원통부(30)의 외경(D3) 간에는, D1 > D2 > D3 의 부등호 관계가 성립한다. 한편 정상나사산(10)의 피치경을 Dp라고 한다면, D1 > Dp ≥ D2 > D3의 관계도 성립한다. Between the outer diameter D1 of the normal screw thread 10, the outer diameter D2 of the lead screw thread 20, and the outer diameter D3 of the non-threaded cylindrical portion 30, an inequality relation of D1 > D2 > D3 holds. On the other hand, if the pitch diameter of the normal screw thread 10 is Dp, the relationship D1 > Dp ≥ D2 > D3 also holds.
또한, 비나사원통부(30)의 외경(D3)은 상대방 암나사의 내경(산경)보다는 작은 것이 바람직하다. 따라서, 비나사원통부(30)는 상대방 암나사에 저항 없이 삽입되고 체결을 리드한다.Also, the outer diameter D3 of the non-threaded cylindrical portion 30 is preferably smaller than the inner diameter (shaft diameter) of the counterpart female thread. Therefore, the non-threaded cylindrical portion 30 is inserted into the opposite female screw without resistance and leads to fastening.
한편, 리드나사산(20)의 가장 선단측에 형성되는 리드나사(20)는 나사가 형성되지 않는 비나사원통부(30)에서 시작하여 약 90도 이하의 영역(1/4 나사 회전 영역)에서 점진적으로 외경을 증가하면서 리드나사산(20)은 완전히 성장한다. 리드나사산(20)의 가장 선단측에는 리드나사 성장시작부(21), 리드나사 성장천이부(22) 및 리드나사 성장완료부(23)를 순차적으로 가진다. 이와 같은 리드나사산(20)의 시작에서 리드나사산 성장완료는 약 90도 이내(1/4 회전)에서 완성된다.On the other hand, the lead screw 20 formed at the most distal end of the lead screw thread 20 starts from the non-screw cylindrical portion 30 where no screw is formed and gradually progresses in an area of about 90 degrees or less (the 1/4 screw rotation area). As the outer diameter increases, the lead screw thread 20 completely grows. A lead screw growth start portion 21, a lead screw growth transition portion 22, and a lead screw growth completion portion 23 are sequentially provided at the distal end of the lead screw thread 20. From the beginning of the lead screw thread 20, growth of the lead screw thread is completed within about 90 degrees (1/4 turn).
이와 같은 리드나사산(20) 선단측의 리드나사 성장시작부(21), 리드나사 성장천이부(22) 및 리드나사 성장완료부(23)를 통칭하여 리드나사 성장부(24)라고 한다. The lead screw growth start portion 21, the lead screw growth transition portion 22, and the lead screw growth completion portion 23 at the tip side of the lead screw head 20 are collectively referred to as the lead screw growth portion 24.
도 2는 본 발명 제1실시예에 따른 축선보정 나사체결구(100)를 선단측에서 바라본 정면도이다. (View “A" 에 따른 정면도) Figure 2 is a front view of the axis correction screw fastener 100 according to the first embodiment of the present invention viewed from the front end side. (Front view according to View “A”)
본 발명 축선보정 나사체결구(100)의 첫 번째 동심원 내부는 나사의 선단부(1)에 해당한다. 두 번째 동심원은 비나사원통부(30)에 해당하고, 첫 번째 동심원 및 두 번째 동심원 사이는 선단 테이퍼부(40)에 해당한다.The inside of the first concentric circle of the axis-correction screw fitting 100 of the present invention corresponds to the front end portion 1 of the screw. The second concentric circle corresponds to the non-threaded cylindrical portion 30, and the area between the first concentric circle and the second concentric circle corresponds to the tip tapered portion 40.
세 번째 동심원은 리드나사산(20)에 해당하고 네 번째 동심원은 정상나사산(10)에 해당한다. The third concentric circle corresponds to the lead thread 20 and the fourth concentric circle corresponds to the normal thread 10.
한편, 동심원의 4사분면에 있는 두 번째 동심원과 세 번째 동심원 사이의 비원형의 곡면은 리드나사 성장시작부(21), 리드나사 성장천이부(22) 및 리드나사 성장완료부(23)로 이루어지는 리드나사 성장부(24)를 표현한 것이다. On the other hand, the non-circular curved surface between the second concentric circle and the third concentric circle in the fourth quadrant of the concentric circle is composed of a lead screw growth start portion 21, a lead screw growth transition portion 22, and a lead screw growth completion portion 23. It expresses the lead screw growth part 24.
한편, 마찬가지로 동심원의 4사분면에 표시된 세 번째 동심원과 네 번째 동심원의 연결부위는 리드나사(20)가 정상나사(10)로 성장하는 연결부(26)를 보여준다. 도면에서 90도 보다 약간 지난 각도에서 리드나사(20)는 정상나사(10)로 성장 완료된다. 본 발명은 리드나사부(20)에서 정상나사부(10)로 성장할 때 나사의 회전각도에 한정되지 않는다. 90도 이내에서 혹은 60도 전후에서 정상나사로 성장 가능하다. On the other hand, similarly, the connection portion of the third concentric circle and the fourth concentric circle marked in the fourth quadrant of the concentric circle shows the connection portion 26 where the lead screw 20 grows into the normal screw 10. In the figure, at an angle slightly past 90 degrees, the lead screw 20 is completed growing into a normal screw 10. The present invention is not limited to the rotation angle of the screw when growing from the lead screw part 20 to the normal screw part 10. It can grow into a normal screw within 90 degrees or around 60 degrees.
동심원의 4사분면에서 각각의 나사가 성장하는 것은 하나의 예시에 불과하다. 임의의 사분면 혹은 위치에서 임의의 회전각도 이내에서 성장은 완료 가능하다. The growth of each screw in the 4 quadrants of concentric circles is just one example. Growth can be completed within any rotation angle in any quadrant or location.
도 3은 본 발명 제2실시예에 따른 축선보정 나사체결구(100)의 측면도이다. 3 is a side view of an axis correction screw fitting 100 according to a second embodiment of the present invention.
본 발명 제2실시예는 제1실시예와 비교 시 리드나사부(20)의 선단기울기(b)가 40도로서 제1실시예의 선단기울기 45도 보다 약간 작은 점에서 차이가 있다.The second embodiment of the present invention is different from the first embodiment in that the slope (b) of the tip of the lead screw portion 20 is 40 degrees, which is slightly smaller than the 45 degrees of the tip of the first embodiment.
나머지 구성요소는 제1실시예와 동일하다. 본 발명 제2실시예에 있어서는 결국 리드나사부(20)의 외경은 제1실시예의 리드나사부(20)의 외경보다 약각 작아지고, 이는 더욱 쉽게 상대방 암나사부에 삽입되고 상대방 암나사의 내경을 타고 넘어 가는 것이 용이하다.The rest of the components are the same as in the first embodiment. In the second embodiment of the present invention, as a result, the outer diameter of the lead screw part 20 is slightly smaller than the outer diameter of the lead screw part 20 of the first embodiment, which is more easily inserted into the other female screw part and goes over the inner diameter of the other female screw part. it is easy
도 4는 본 발명 제3실시예에 따른 축선보정 나사체결구(100)의 측면도이다. 4 is a side view of an axis correction screw fitting 100 according to a third embodiment of the present invention.
본 발명 제3실시예는 제1실시예 및 제2실시예와 비교 시 리드나사부(20)의 선단기울기(b)가 50도인 점에서 제1실시예(45도) 및 제2실시예(40도)와 상이하다. The third embodiment of the present invention compares the first embodiment (45 degrees) and the second embodiment (40 degrees) in that the tilt (b) of the tip of the lead screw portion 20 is 50 degrees compared to the first and second embodiments. Fig.) is different from
나머지 구성요소는 제1실시예 및 제2실시예와 동일하다. 본 발명 제3실시예는 결국 리드나사부(20)의 외경은 제1실시예 혹은 제2실시예보다 커지게 된다. The rest of the components are the same as those of the first and second embodiments. In the third embodiment of the present invention, the outer diameter of the lead screw portion 20 is larger than that of the first or second embodiments.
도 5는 본 발명 제4실시예에 따른 축선보정 나사체결구(100)의 측면도이다. 5 is a side view of an axis correction screw fitting 100 according to a fourth embodiment of the present invention.
본 발명 제5실시예는 선단테이퍼부(40)의 형상이 제1 내지 제3 실시예와 상이하다. 제1내지 제3실시예의 선단테이퍼부(40)는 적당한 라운드 처리가 된 테이퍼부이며, 제5실시예는 직선형 테이퍼부에 해당한다. In the fifth embodiment of the present invention, the shape of the tip tapered portion 40 is different from the first to third embodiments. The tip tapered portion 40 of the first to third embodiments is a tapered portion with appropriate rounding, and the fifth embodiment corresponds to a straight tapered portion.
본 발명 제1실시예에서 제3실시예는 피치가 4 내지 15밀리인 일반적으로 많이 사용하는 체결용 볼트에 적용하여 보았더니, 리드나사산의 선단기울기가 40 내지 50도의 경우에서 양호한 결과를 얻었다. 그러나, 대부분의 체결용 볼트에 있어서 선단기울기가 55도 이상인 경우 혹은 선단기울기가 35도 이하에서는 축선보정 기능 및 리드나사산의 외경관리에 있어서 부정적인 결과가 도출되었다.The first to third embodiments of the present invention were applied to commonly used fastening bolts having a pitch of 4 to 15 mm, and good results were obtained when the tip inclination of the lead screw thread was 40 to 50 degrees. However, in most fastening bolts, negative results were obtained in the axis correction function and the outer diameter management of the lead screw when the tip angle was 55 degrees or more or the tip angle was 35 degrees or less.
본 발명은 위 실시예 이외에도 다양한 실시예가 가능하다. 따라서 본원발명은 위 실시예에 한정되지 않는다. Various embodiments of the present invention are possible in addition to the above embodiments. Therefore, the present invention is not limited to the above embodiment.
전술한 본 발명의 설명은 예시를 위한 것이며, 본 발명이 속하는 기술분야의 통상의 지식을 가진 자는 본 발명의 기술적 사상이나 필수적인 특징을 변경하지 않고서 다른 구체적인 형태로 쉽게 변형이 가능하다는 것을 이해할 수 있을 것이다. 그러므로 이상에서 기술한 실시예들은 모든 면에서 예시적인 것이며 한정적이 아닌 것으로 이해해야만 한다. 예를 들어, 단일형으로 설명되어 있는 각 구성 요소는 분산되어 실시될 수도 있으며, 마찬가지로 분산된 것으로 설명되어 있는 구성 요소들도 결합된 형태로 실시될 수 있다.The above description of the present invention is for illustrative purposes, and those skilled in the art can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as distributed may be implemented in a combined form.
본 발명의 범위는 후술하는 특허청구범위에 의하여 나타내어지며, 특허청구범위의 의미 및 범위 그리고 그 균등 개념으로부터 도출되는 모든 변경 또는 변형된 형태가 본 발명의 범위에 포함되는 것으로 해석되어야 한다.The scope of the present invention is indicated by the following claims, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts should be interpreted as being included in the scope of the present invention.

Claims (10)

  1. 축선보정 나사체결구에 있어서,In the axis correction screw fitting,
    선단부와 후단부를 가지는 나사기둥에 형성된 복수개의 정상나사산을 갖는 정상나사부; 및a normal screw portion having a plurality of normal screw threads formed on a screw column having a front end and a rear end; and
    상기 나사기둥의 상기 선단부와 복수개의 상기 정상나사산 사이에 형성되며, 적어도 하나의 리드나사산을 갖는 리드나사부를 포함하고,It is formed between the tip of the screw column and the plurality of normal screw threads, and includes a lead screw portion having at least one lead screw thread,
    상기 리드나사산은 일정각도의 후단부기울기를 가지는 후단경사면, 상기 후단부기울기보다 작은 선단부기울기를 가지는 선단경사면 및 상기 후단경사면 및 상기 선단경사면과 서로 접하는 완만한 곡면으로 이루어지는 중앙만곡부를 포함하는 리드나사산 프로파일을 가지는 것을 특징으로 하는 축선보정 나사체결구.The lead screw thread includes a rear inclined surface having a rear end slope of a predetermined angle, a front inclined surface having a tip slope smaller than the rear end slope, and a central curved portion composed of a gentle curved surface in contact with the rear inclined surface and the tip inclined surface. Axis correction screw fastener characterized in that it has a profile.
  2. 제1항에 있어서,According to claim 1,
    상기 중앙만곡부는 단일 곡률반경을 가지도록 이루어진 것을 특징으로 하는 축선보정 나사체결구.The axis correction screw fastener, characterized in that the central curved portion is made to have a single radius of curvature.
  3. 제2항에 있어서,According to claim 2,
    상기 중앙만곡부의 곡률반경의 중심은 상기 후단경사면의 연장선과 상기 선단경사면의 연장선이 서로 만나는 지점보다 상기 선단부 쪽으로 옵셋된 것을 특징으로 하는 축선보정 나사체결구.The axis correction screw fastener, characterized in that the center of the curvature radius of the central curved portion is offset toward the distal end than a point where the extension line of the rear end inclined surface and the extension line of the tip inclined surface meet each other.
  4. 제1항 내지 제3항 중 어느 한 항에 있어서,According to any one of claims 1 to 3,
    상기 나사기둥의 적어도 하나의 리드나사산과 상기 선단부 사이에는 나사가 형성되지 않은 비나사원통부가 구비된 것을 특징으로 하는 축선보정 나사체결구.An axis-correction screw fastener, characterized in that a non-threaded cylindrical portion is provided between at least one lead screw thread of the screw column and the tip portion.
  5. 제4항에 있어서,According to claim 4,
    상기 비나사원통부의 외경은 체결되는 상대방 암나사의 나사산 내경보다 작은 것을 특징으로 하는 축선보정 나사체결구.The axis correction screw fastener, characterized in that the outer diameter of the non-screw cylindrical portion is smaller than the inner diameter of the screw thread of the counterpart female screw to be fastened.
  6. 제4항에 있어서,According to claim 4,
    상기 비나사원통부와 상기 선단부 사이에는 선단테이퍼부가 형성된 것을 특징으로 하는 축선보정 나사체결구.Axis correction screw fasteners, characterized in that a tip tapered portion is formed between the non-screw cylindrical portion and the tip portion.
  7. 제6항에 있어서,According to claim 6,
    적어도 하나의 상기 리드나사산의 선단측에는, 상기 비나사원통부로부터 1/4 나사 회전 각도 이내에서 상기 리드나사산의 외경이 점진적으로 성장을 완료하는 리드나사성장부를 갖는 것을 특징으로 하는 축선보정 나사체결구.An axis-correction screw-fitting device characterized in that, at a tip side of at least one lead screw thread, a lead screw growth portion in which an outer diameter of the lead screw thread gradually completes growth within a 1/4 screw rotation angle from the non-screw cylindrical portion.
  8. 제1항에 있어서,According to claim 1,
    상기 선단부기울기는 40도 내지 50도 영역인 것을 특징으로 하는 축선보정 나사체결구.The axis correction screw fastener, characterized in that the inclination of the tip is in the range of 40 to 50 degrees.
  9. 제6항에 있어서,According to claim 6,
    상기 선단테이퍼부는 라운드 또는 직선형태로 이루어진 것을 특징으로 하는 축선보정 나사체결구.The axis correction screw fastener, characterized in that the tip tapered portion is made of a round or straight shape.
  10. 제1항에 있어서,According to claim 1,
    상기 리드나사부는 상기 정상나사산의 피치경보다 작거나 같은 상기 리드나사산 외경을 갖도록 이루어진 것을 특징으로 하는 축선보정 나사체결구.The lead screw portion is configured to have an outer diameter of the lead screw thread that is smaller than or equal to the pitch diameter of the normal screw thread.
PCT/KR2022/008732 2021-06-29 2022-06-20 Axial line adjusting screw fastener WO2023277424A1 (en)

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KR102383042B1 (en) * 2021-06-29 2022-04-08 주식회사 윤영테크 An axial alignment compensation thread fastener
DE102022121435A1 (en) * 2022-08-24 2024-02-29 Ejot Se & Co. Kg Screw for direct screwing into a component

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US20020076302A1 (en) * 2000-12-19 2002-06-20 Garver Michael A. Fastener with aligning lead thread
KR20100055462A (en) * 2007-08-13 2010-05-26 리써치 엔지니어링 앤 매뉴팩쳐링, 인크. Thread forming fastener
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JP2018189244A (en) * 2018-08-02 2018-11-29 株式会社トープラ Male screw member
KR102383042B1 (en) * 2021-06-29 2022-04-08 주식회사 윤영테크 An axial alignment compensation thread fastener

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